Sounds to me like to much pressure in the
system...... Blown head gasket is not always a external leak!

            Eric                   86-VW4x4
            vw4x4@fyi.net          72-240z
            Pittsburgh, PA USA     1936-Chrysler

On Sat, 19 Sep 1998, Wes Johnson wrote:

> Installed a new expansion tank and coolant level sensor into our 89 Westy.
> Everything went fine, maybe too easy. Wife and I drove to another town
> about fifteen miles away for lunch. Came out of the restaurant to coolant
> under the car. Check it out and the coolant sensor switch is loose. OK. So
> the system gets hot and the sensor loosens up, tighten it down and head
> home. Park the van in the carport, step outside walk around the the back,
> whooooosh, steam, coolant everywhere. Look under hatch and coolant sensor
> is totally blown out of the hole. OK, look at sensor, no threads under the
> O ring, figure maybe this thing can be screwed down too far? Put the
> coolant sensor back in, refill coolant, test drive, park car, no leak, go
> into house. Ten minutes later go outside and check. Coolant under vanagon,
> coolant sensor laying on top of expansion tank.
>
> Anyone ever experienced this wonderful scenario. Hard to believe that a few
> threads on the coolant sensor stand between driving this thing or not.
>
> ----------------------------
> Wes Johnson
> wesj@callamer.com
>
> 89 Westy GL
> ----------------------------
>